Overview

Ostarine is a type of drug called a selective androgen receptor modulator (SARM). It's not approved by the FDA, but is sometimes found in supplements.

Ostarine attaches to proteins in the body known as androgen receptors. When ostarine binds to these receptors, it tells muscles to grow.

People use ostarine for athletic performance, involuntary weight loss due to illness, breast cancer, and many other conditions, but there is no good scientific evidence to support these uses.

Ostarine is an investigational drug and therefore not approved for any use by the US FDA. Despite this, it is still sometimes found in dietary supplements, particularly those marketed for bodybuilding. Ostarine, along with other SARMS, is banned by the World Anti-Doping Agency (WADA) and the National Collegiate Athletic Association (NCAA).

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